Error using matlab.ui.​control.in​ternal.mod​el.Abstrac​tNumericCo​mponent/se​t.Value (line 111) 'Value' must be a double scalar.

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Patrick Schneider
Patrick Schneider 2022-5-18
评论： Walter Roberson 2022-5-19
I am trying to create a matlab app converting between different temperatures however when I try to run it for some reason the error message "Error using matlab.ui.control.internal.model.AbstractNumericComponent/set.Value (line 111) 'Value' must be a double scalar" comes out and I am not sure why. Please let me know if you u have any questions!

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回答（2 个）

Voss
Voss 2022-5-19
编辑：Voss 2022-5-19
Try it without converting to string
app.EditField.Value = Re;
because if app.EditField is a NumericEditField, its Value is a number, not a string.
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Walter Roberson
Walter Roberson 2022-5-19
What were the outputs?
Note that the disp() in particular is intended to be before the assignment... though now that I think about it, it would be good to also have the same statement after the assignment.
Walter Roberson
Walter Roberson 2022-5-19
if you change the code to
size(Re)
class(Re)
disp(app.EditField.Value)
app.EditField.Value = Re;
disp(app.EditField.Value)
Then what shows up in the command window?

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Patrick Schneider
Patrick Schneider 2022-5-19
The output is a numeric edit field.

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